Because there’s a very high chance that they’ll end up adding reward tiers up to level 1000 eventually, since that was the last titled rank-up in old PD - I’m at 625 and counting, really most of it’s just for the fun of doing the project, haha
Also the Marshal will already be added this winter at likely level 300, and its skin at 350 - I’ve made some predictions for how the rest of the tiers may look here, actually: [Project Discovery] Predictions for future Tier Rewards and Ranks